Something else is going on here. You don't have 3 bad sensors. The P0455 is an EVAP code and unrelated to these problems so ignore that for now.
I would clear the codes and then run it to see if all of the other 3 come right back simultaneously. I believe all 3 of these sensors are 3 wire sensors that work off a common 5v reference signal. I'm suspecting there is a problem with either the 5v reference signal or a common ground used for all 3 sensors The P0122 is a TPS code that you didn't mention before.
Saturday, October 26th, 2013 AT 2:56 PM